US3704873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cooling cement clinker
Assignee: FLSmidth and Co AS
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Filing: 1971-08-18
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Granted: 1972-12-05
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Expires: 1991-08-18
Abstract
Abstract Method and apparatus for cooling a rotary kiln product, for example cement clinker, by means of atmospheric air caused to flow countercurrently to the clinker through cooling tubes rotating with and provided in planetary fashion around the outlet end of the rotary kiln in which the clinker is manufactured, and connected with the kiln through substantially radial chutes through which the clinker passes into the tubes, additional outside air being introduced directly into the cooler tubes.
Inventors
- 👤 Flemming Edvin Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:15
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/38; F27B7/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A method of cooling rotary kiln solid material by means of atmospheric air caused to flow countercurrently to the material through cooler tubes rotating with and provided in planetary fashion around the outlet end of the rotary kiln in which the material is treated, and connected with the kiln through substantially radial chutes through which the material passes into the cooler tubes, characterized in that in addition to the amount of air taken in through the solid material outlet of each cooler tube an additional amount of atmospheric air is introduced through at least one openiNg provided in the wall of the cooler tube.
Claim 2
Independent Claim
104 words
A method of cooling rotary kiln solid material by means of atmospheric air caused to flow countercurrently to the material through cooler tubes rotating with and provided in planetary fashion around the outlet end of the rotary kiln in which the material is treated, and connected with the kiln through substantially radial chutes through which the material passes into the cooler tubes, characterized in that in addition to the amount of air taken in through the solid material outlet of each cooler tube an additional amount of atmospheric air is introduced through at least one openiNg provided in the wall of the cooler tube.
Claim 3
Dependent Claim
26 words
A method as claimed in claim 1, characterized in that the additional air is introduced exclusively near the solid material inlet end of the cooler tube.
Claim 4
Dependent Claim
42 words
A method according to claim 2, characterized in that the additional air is introduced into the individual cooler tube only during the intervals in the rotation of the kiln during which solid material is passing through the chute of the cooler tube.
Claim 5
Dependent Claim
125 words
Apparatus for cooling solid material treated in a rotary kiln which comprises a plurality of cooler tubes arranged in planetary fashion around the outlet end of a rotary kiln with their axes parallel or substantially parallel to the axis of the kiln, each cooler tube having at one end an opening forming an inlet for cooling air and the outlet for cooled solid material, and at the other end an opening which is connected with the interior of the kiln through a chute for hot solid material from the kiln and the inlet to the kiln for the cooling air from the cooler tube, characterized in that the wall of the cooler tube is provided with at least one opening for introducing additional cooling air.
Claim 6
Dependent Claim
125 words
Apparatus for cooling solid material treated in a rotary kiln which comprises a plurality of cooler tubes arranged in planetary fashion around the outlet end of a rotary kiln with their axes parallel or substantially parallel to the axis of the kiln, each cooler tube having at one end an opening forming an inlet for cooling air and the outlet for cooled solid material, and at the other end an opening which is connected with the interior of the kiln through a chute for hot solid material from the kiln and the inlet to the kiln for the cooling air from the cooler tube, characterized in that the wall of the cooler tube is provided with at least one opening for introducing additional cooling air.
Claim 7
Dependent Claim
30 words
A cooler as claimed in claim 4, characterized in that there is only one opening for introducing additional air, provided near the junction between the cooler tube and the chute.
Claim 8
Dependent Claim
35 words
A cooler as claimed in claim 4, characterized in that each individual opening for introducing additional air is provided with a grate serving to prevent solid material from leaving the cooler tube through the opening.
Claim 9
Dependent Claim
61 words
A cooler as claimed in claim 5, characterized in that the opening for introducing additional air is provided with means to ensure that the opening is free during the intervals of the kiln rotation in which the amount of cooling air introduced through the opening has an opportunity of sweeping the solid material, while it is closed during the remaining time.
Claim 10
Dependent Claim
31 words
A cooler as claimed in claim 7, characterized in that the means for alternately uncovering and covering the auxiliary air opening for introducing additional air consists of a compulsorily controlled damper.
Claim 11
Dependent Claim
34 words
A cooler as claimed in claim 4 characterized in that the rotating kiln/cooler is provided with fans, advantageously one for each cooler tube, connected to force cooling air through each opening for additional air.
References Cited (Backward Citations)
US1678313A
Cited
US3512764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |